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Associativity of the regular semidirect product of existence varieties
Published online by Cambridge University Press: 09 April 2009
Abstract
The associativity of the regular semidirect product of existence varieties introduced by Jones and Trotter was proved under certain condition by Reilly and Zhang. Here we estabilsh associativity in many new cases. Moreover, we prove that the regular semidirect product is right distributive with respect to the join operation. In particular, both associativity and right distriutivity yiel within the varieties of completely simple semigroups. Analogous results are obtainedj for e-pseudovarieties of finite regular semigroups.
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- Copyright © Australian Mathematical Society 2000
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